Earth-auger



.0. A. SCOTT. EARIH AUGER N0. EM HSB. Patented Mar. 1, 1892.

1 UNETED Fries.

CHARLES ALBERT SCOTT, OF LINCOLN, NEBRASKA.

EARTH-AUGER.

SPECIFICATION forming part of Letters Patent No. 470,168, dated March 1. 1892.

Application filed November 6, 1891. Serial No. 411,039. (No model.)

To all whom, it may concern:

Be itknown that 1, CHARLES ALBERT Scorr, a citizen of the United States of America, residing at Lincoln, in the countyof Lancaster and State of Nebraska, have invented certain new and useful Improvements in Earth-Augers, of which thefollowing is a specification, reference being had therein to the accompanying drawings.

My invention relates to earth-angers of the variety teehnicallyealled pod-angers, those in which convergent blades depend from a head-plate.

The objectof my invention is to produce an earth-anger having holding-blades of such width as to be capable of holding the earth cut loose by the cutting-blades and of such shape relatively to the shape of the cuttingblades as to present the minimum frictional surface to the wall of the hole being bored, to provide means whereby the holding-blades may be easily and conveniently opened to discharge the earth from the auger and then be automatically cl'sed, and to provide for ready adjustment of all the blades in order to render theauger capable'of cutting holes of varying sizes.

The invention will first be described in connection with the accompanying drawings, and then pointed out in the claims.

Figure l of the drawings is a perspective View of my improved earth-auger. Fig. 2 is a vertical sectional View, partly in elevation, the open position of the holding-blades and their operating-springs being shown in dotted lines. Fig. 3 is a cross-section taken on the line a: on, Fig. 2,'looking in the direction indicated by the arrow. taken on the line y 3/, Fig. 2, looking in the direction indicated by the arrow.

Referring to the drawings,A represents the head-plate, upon the upper side of which are formed four flanged guideways 1. Through the head-plate in each of these ways there is a slot 2, and in the periphery of the plate at the outer end of each of the ways is a recess 3.

B are four right-angle blocks, the horizontal portions of which are adapted to slide in the guideways 1 in the head-plate, the vertical portions bein g received in the recesses Theseblocksare slotted at 4to register with the slots 2 in the head-plate, and they are adjust- Fig. 4 is a cross-section ably secured to the plate by means of screws 5, which pass through the slots in the blocks and plate and engage with nuts 6, as seen in Figs. 2 and 4.

. C are two cutting-blades secured opposite each other to two of the blocks -13. These blades, which are comparatively narrow, are straight in cross-section and sharpened on one edge 7, as clea'rly shown in Fig. 4., and they, like the holdingblades hereinafter mentioned, converge toward the lower end, as seen in Figs. 1 and 2.

D are what 1 term the holdingblades. They are preferably about twice the width of the cutting-blades, are spoon-shaped, and are blunt on both'ed'ges, as seen in the drawings. These blades have long integral shanks d,

which are pivoted at 8 to the vertical por tions of two of the blocks B, opposite each other, as clearly shown in Fig; I E is'the handle, the lower end of which is suitably secured in the head-plate.

F is a collarloosely mounted on the handle.

G represents two leaf-springs, which are secured at their upper ends to the collar F and at theirlower endsto the shanks of theholdingblades. Itwill be observed that as the cuttingblades are straight in cross-section and the holding-blades are spoon-shaped, the whole outer surface of the latter, withthe exception of the middle portion, falls within the line of out of the cutters,so that the holding-blades present but slight surface exposed to i'rictional contact with the wall of the hole being bored and yet having sufiicient width to retain the loose earth within the auger until the latter is withdrawn from the ground, when the earth can readily be discharged by simply pre sing upon the springs G, thereby causingth holding-blades to swing open, they closing automatically when the springs arev released from pressure. It will also be seen that as the blades are adjustable not only is the auger capable of being made to cut holes of different sizes, but its cutting-blades may be so adjusted with relation to the holdingblades as to make athicker or thinner cut, as may be desired, when working in hard or soft ground.

Having thus described inyinvention, what I claim as new, and desire to secure by Let- 4ers1atent, is-

strai ht 5 L An earth auger having cutting -bla-rle.=s straight in 02 0 section. and pivoted spoon shaped holdingblades.

2. An om'tb --z1uger hazing cutting-Diodes straight in cross-soction and pivoted sprirvr actuated holding-blmles.

3. An u'th-augor havifig cutting-blades muss-section and pivoted spring actuated spoon-shaped holdi11g-blades.

4. In an earth-auger, tho combination, with a. head-plate, bioc-ks adjustable on said plate,

and 2e handle secured to the plate, of a plurnlify o'f ,cuti'ingJflades straight in cros-.1-.-sec horn each rigidlysecured to one of said blocks, r: plurality of spoon-shaped holdingblades, each pivoted to one of saidblooksmnd means for opening and closing the holding-Modes.

Au earth-anger comprisinga head-plate, four Mocks adjustable on said plateflwoonbfing-hmios straight in c1os.=s-section, each rigidly secured to one of the blocks, two spoonshaped holding-blades, each having a shank and pivoted to one of the blocks, a. hzuullesocured to the henc'iplnte, acoliarloqsely mounted on the handle, and two leaf-springs, ouch :secm'ed at one end to said collar and at the other end to the shank of tho holding-Modes.

In testimony whereof I aflix my signatuz 1- in pro-sou ce of two witnesses.

CHARLES ALBERT SCOT'J.

Witnesses: v

VILLIAM PAVEY, SAM. M. CLAY. 

